We look at the division of 900933 by 80 
The aim is to understand the frequency of 80 in 900933.

Step 1:
If we divide 9 by 80, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 80

Going ahead to step 2:
The number 80 fits into 90 1 times, leaving a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 80 from 90 and we're left with 10.
Include the next digit (0) from the dividend after 10, then repeat: 100 / 80

Let's proceed to step 3:
100 divided by 80 is 1 with a remainder of 20.
The next digit of our result is 1. 
Result so far: 11.0
If we take 80 away from 100, we end up with 20.
Take the next digit (9) from the dividend and append it to 20, then repeat: 209 / 80

Moving on to step 4:
209 divided by 80 is 2 with a remainder of 49.
The number 2 becomes the next digit in our result. 
Result so far: 112.0
Deduct 160 from 209 and we're left with 49.
Grab the next digit (3) from the dividend, add it to 49, then carry on: 493 / 80

Moving on to step 5:
80 can be fit into 493 6 times, resulting in a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 1126.0
If we take 480 away from 493, we end up with 13.
Bring next digit (3) of the dividend behind the 13 and repeat the process: 133 / 80

Advancing to step 6:
When dividing 133 by 80, we get 1 with a remainder of 53.
The number 1 becomes the next digit in our result. 
Result so far: 11261.0
Subtract 80 from 133 to get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 7:
The number 80 fits into 530 6 times, leaving a remainder of 50.
The next digit of our result is 6. 
Result so far: 11261.6
Deduct 480 from 530 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 8:
80 can be fit into 500 6 times, resulting in a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 11261.66
Deduct 480 from 500 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 11261.66 and a remainder of 0.02.